Non-Toxin Adhesiveless Slipper and Processing Method Thereof

ABSTRACT

Non-toxin adhesiveless slipper includes an upper portion and a lower portion; wherein the upper portion and the lower portion are bonded with each other by an adhesive film. A processing method for bonding an upper portion and a lower portion together, including steps of: a. heat melting the EVA and the EAA to form a fluid compound, and blowing the fluid compound on a bottom surface of the upper portion to form an adhesive film; b. placing an isolated paper on the adhesive film; c. placing the upper portion into a heat-pressing machine to ensure the adhesive film and isolated paper securely attached on the bottom surface of the upper portion; d. placing a rubber sheet on a mold to process a heat pressing and then removing the remaining rubber on the contours of the mold to form the lower portion; e. placing the upper portion and the lower portion into a sectional die, and then processing the heat-pressing.

NOTICE OF COPYRIGHT

A portion of the disclosure of this patent document contains materialwhich is subject to copyright protection. The copyright owner has noobjection to any reproduction by anyone of the patent disclosure, as itappears in the United States Patent and Trademark Office patent files orrecords, but otherwise reserves all copyright rights whatsoever.

BACKGROUND OF THE PRESENT INVENTION Field of Invention

The present invention relates to a slipper, and more particularly to anon-toxin adhesiveless slipper and its processing method.

Description of Related Arts

Traditional shoe soles are made of rubber materials and vulcanizingagents, such as butadiene rubbers and styrene-butadiene rubbers, andthen the processing oil and the silicon dioxide are added into therubber materials and the vulcanizing agents to process the regularvulcanization to form raw materials for the shoe soles, wherein theseraw materials have a good abrasion resistance. However, these rawmaterials have several drawbacks. These raw materials for shoe soles arenot thermoplastic materials, and cannot be recycled.

Thermoplastic rubbers are well-known recyclable materials. In otherwords, the thermoplastic rubbers are eco-friendly materials. Therefore,the thermoplastic rubbers can be used to replace the traditional shoesole materials (styrene-butadiene rubbers and butadiene rubbers).

In addition, in the traditional manufacturing process for the slipper,an upper portions of the slippers are bonded on the shoe soles by glues.However, gases may retained inside the glues to reduce the adhesiveability of the glues. In this manner, the upper portions of the slippersare easily to be detached from the shoe soles, especially after theslippers are soaked into the water. During the manufacturing process,the glues are always toxic substances, so the glues not only is harmfulfor the human bodies, but also is a non-eco-friendly materials.Therefore, an adhesiveless slipper is highly desired in order to solvethe above mentioned problems.

SUMMARY OF THE PRESENT INVENTION

The invention is advantageous in that it provides a non-toxinadhesiveless slipper, wherein an upper portion and a lower portion ofthe non-toxin adhesiveless slipper are made of eco-friendly material,and in such a manner, the non-toxin adhesiveless slipper can berecycled.

Another advantage of the invention is to provide a non-toxinadhesiveless slipper, wherein an adhesive film is provided to attach ona bottom surface of the upper portion for bonding the lower portion ofthe non-toxin adhesiveless slipper with the upper portion thereof, andin other words, no glue is applied in the present invention.

Another advantage of the invention is to provide a non-toxinadhesiveless slipper, wherein no toxic substance is released and appliedduring the upper portion thereof and the lower portion thereof areattached with each other, so as to reduce the possibility for pollutingthe environment.

Another advantage of the invention is to provide a non-toxinadhesiveless slipper, wherein no expansive or complicated structure isrequired to employ in the present invention in order to achieve theabove mentioned advantages. Therefore, the present inventionsuccessfully provides an economics and efficient solution for providingmore eco-friendly slippers without affecting the main structure of theslippers.

Additional advantages and features of the invention will become apparentfrom the description which follows, and may be realized by means of theinstrumentalities and combinations particular point out in the appendedclaims.

According to the present invention, the foregoing and other objects andadvantages are attained by a non-toxin adhesiveless slipper, comprising:

an upper portion and a lower portion; wherein

the upper portion and the lower portion are bonded with each other by anadhesive film.

In accordance with another aspect of the invention, the presentinvention comprises a processing method for bonding a upper portion anda lower portion of a non-toxin adhesiveless slipper with each other,wherein the processing method comprises steps of:

a. heat melting the EVA and the EAA to form a fluid compound, andblowing the fluid compound on a bottom surface of the upper portion ofthe non-toxin adhesiveless slipper to form an adhesive film;

b. placing an isolated paper on the adhesive film;

c. placing the upper portion (the adhesive film and the isolated paperare already placed thereon) into a heat-pressing machine for 16-20seconds, and the temperature of the heat-pressing machine is around 150°C. to 180° C., so as to ensure the adhesive film and isolated papersecurely attached on the bottom surface of the upper portion;

d. placing a rubber sheet on a mold to process a heat pressing for 45-60seconds, and the pressing temperature is around 150° C. to 180° C., andthen removing the remaining rubbers on the contours of the mold toobtain a lower portion of the non-toxin adhesiveless slipper; and

e. placing the upper portion and the lower portion into a sectional die,and then processing the heat-pressing for 240-300 seconds, and theheat-pressing temperature is around 150° C. to 200° C. in order tocombine the upper portion and the lower portion to form an integrity.

Still further objects and advantages will become apparent from aconsideration of the ensuing description and drawings.

These and other objectives, features, and advantages of the presentinvention will become apparent from the following detailed description,the accompanying drawings, and the appended claims.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

The following description is disclosed to enable any person skilled inthe art to make and use the present invention. Preferred embodiments areprovided in the following description only as examples and modificationswill be apparent to those skilled in the art. The general principlesdefined in the following description would be applied to otherembodiments, alternatives, modifications, equivalents, and applicationswithout departing from the spirit and scope of the present invention.

A non-toxin slipper according to a preferred embodiment of the presentinvention is illustrated, wherein the non-toxin slipper comprises anupper portion and a lower portion, wherein the upper portion is embodiedas a shoe pad and the lower portion is embodied as a shoe sole. The mainmaterials of the lower portion are natural rubbers and ethylenepropylene rubbers. The raw materials of the lower portion comprisesnatural rubber, ethylene propylene rubbers, white mineral oil, whitecarbon, polypropylene, starch-filled substance, vulcanizationaccelerator, and stearic acid, and the weight ratio of the naturalrubber, ethylene propylene rubbers, white mineral oil, white carbon,polypropylene, starch-filled substance, vulcanization accelerator, andstearic acid is 40:33:17:5:5-15:6-15:2-5:3.

It is worth to mention that the lower portion of the non-toxinadhesiveless slipper can be made of synthetic rubbers. Furthermore, thelower portion of the non-toxin adhesiveless slipper also can be made ofthe thermoplastic polyolenfin, wherein the thermoplastic polyolenfincomprises ethylene propylene, white mineral oil, and isoprene, whereinthe weight ratio of the ethylene propylene, white mineral oil, and is33-37:14-17:46-53.

Accordingly, the upper portion of the non-toxin adhesiveless slipper aremade of EVA components, wherein the EVA components comprises EVA,polyoxyethylene, filling agent, natural particles, cross-linking agent,zinc oxide, foaming agent, and stearic acid, wherein the weight ratio ofEVA, polyoxyethylene, filling agent, natural particles, cross-linkingagent, zinc oxide, foaming agent, and stearic acid is10-20:30-40:10-15:30-40:0.5-5.5:2.0-3.0:0.8-5.8:10-20.

Accordingly, the lower portion and the upper portion of the non-toxinadhesiveless slipper are bonded with each other by an adhesive film,wherein the adhesive film is a non-toxin adhesive film. The adhesivefilm is a compound film which is made of EAA(ethylene acrylic acid) andEVA (ethylene-vinyl acetate), and the weight ratio of EAA and EVA is80-86:14-20. It is worth to mention that the adhesion rate of theadhesive film is larger than the PE (polyethylene) film. Alternatively,the adhesive film also can be a composite PE film, wherein the compositePE film comprises low density polyethylene and linear and low densitypolyethylene.

A processing method for bonding the upper portion of the non-toxinadhesiveless slipper on the lower portion of the non-toxin adhesiveslipper according to the above mentioned preferred embodiment of thepresent invention is illustrated, wherein the processing methodcomprises steps of:

a. heat melting the EVA and the EAA to form a fluid compound, andblowing the fluid compound on a bottom surface of the upper portion ofthe non-toxin adhesiveless slipper to obtain an adhesive film;

b. placing an isolated paper on the adhesive film;

c. placing the upper portion (the adhesive film and the isolated paperare already placed thereon) into a heat-pressing machine for 16-20seconds, and the temperature of the heat-pressing machine is around 150°C. to 180° C., so as to ensure the adhesive film and isolated papersecurely attached on the bottom surface of the upper portion.

d. placing a rubber sheet on a mold to process a heat pressing for 45-60seconds, and the pressing temperature is around 150° C. to 180° C., andthen removing the remaining rubber on the contours of the mold to obtaina lower portion of the non-toxin adhesiveless slipper; and

e. placing the upper portion and the lower portion into a sectional die,and then processing the heat-pressing for 240-300 seconds, and theheat-pressing temperature is around 150° C. to 200° C. in order tocombine the upper portion and the lower portion to form an integrity.

In the step a, the adhesive film is a porous film. It is worth tomention that some gases may be released after the EVA material isheated, so the gases may attached on the adhesive film to cause thebroken film, and then the adhesive ability of the adhesive film will bereduced.

In the step d, the sizes and shapes of the lower portion of thenon-toxin adhesiveless slipper are the same as that of the upper portionthereof.

EXPERIMENTAL EXAMPLES

The non-toxin adhesiveless slipper prepared according to a preferredembodiment of the present invention is tested by the following toxicsubstance: alkylphenol & alkylphenolethoxylate, banned azo dyes,chlorobenzene and chlorotoluene, chlorophenols, chlorinated solvents,flame retardant, heavy metals, organotin compounds, phthalates,perfluorooctanesulfonates & perfluorooctanoic acid, and shot-chainchlorinated paraffins. The non-toxin adhesiveless slipper is testedwhich comprises the upper portion M1 and the lower portion M2.

The test method for alkylphenol & alkylphenolethoxylate is performed asspecified in ISO 18218 (modified). The results from the upper portion M1and the lower portion M2 are shown in Table 1. Remark:-n.d.=notdetected.

TABLE 1 Report Limit Result (mg/Kg) Compounds CAS No. (mg/Kg) M1 M2Nonylphenol (NP) 25154-52-3 5 n.d. n.d. Octylphenol (OP) 27193-28-8 5n.d. n.d. Nonylphenolethoxylate 9016-45-9 5 n.d. n.d. (NPEO)Octylphenolethoxylate 9002-93-1 5 n.d. n.d. (OPEO)

The test method for banned azo dyes is performed as specified in GB/T17592-2011 & GB/T 23344-2009 for 4-aminozobenzene (modified). Theresults from the upper portion M1 and the lower portion M2 are shown inTable 2. Remark:-n.d.=not detected.

TABLE 2 Report Limit Result (mg/Kg) Compounds CAS No. (mg/Kg) M1 M2Biphenyl-4-ylamine 92-67-1 5 n.d. n.d. Benzidine 92-87-5 5 n.d. n.d.4-Chloro-o-toluidine 95-69-2 5 n.d. n.d. 2-Naphthylamine 91-59-8 5 n.d.n.d. 4-amino-2′,3- 97-56-3 5 n.d. n.d. dimethylazobenzene5-nitro-o-toluidine 99-55-8 5 n.d. n.d. 4-chloroaniline 106-47-8 5 n.d.n.d. 4-methoxy-m- 615-05-4 5 n.d. n.d. phenylenediamin4,4′-methylenedianiline 101-77-9 5 n.d. n.d. 3,3′-dichlorobenzidine91-94-1 5 n.d. n.d. 3,3′-dimethoxybenzidine 119-90-4 5 n.d. n.d.3,3′-dimethylbenzidine 119-93-7 5 n.d. n.d. 4,4′-methylenedi-o-toluidine838-88-0 5 n.d. n.d. 6-methoxy-m-toluidine 120-71-8 5 n.d. n.d.4,4′-methylene-bis-(2- 101-14-4 5 n.d. n.d. chloro-aniline)4,4′-oxydianiline 101-80-4 5 n.d. n.d. 4,4′-thiodianiline 139-65-1 5n.d. n.d. o-Toluidine 95-53-4 5 n.d. n.d. 4-methyl-m- 95-80-7 5 n.d.n.d. 2,4,5-Trimethylaniline 137-17-7 5 n.d. n.d. o-anisidine 90-04-0 5n.d. n.d. 4-aminoazobenzene 60-09-3 5 n.d. n.d. 2,4-Dimethylaniline95-68-1 5 n.d. n.d. 2,6-Dimethylaniline 87-62-7 5 n.d. n.d.

It is worth to mention that 4-amino-2′,3-dimethylazobenzene (CAS No.97-56-3) and 5-nitro-o-toluidine (CAS No. 99-55-8) are further reducedinto o-toluidine (CAS No. 95-53-4) and 4-methyl-m-phenylenediamine (CASNo. 95-80-7). In case of that polyurethane materials are used, it cannotbe ruled out that certain amines, e.g. 4,4′-methylenedianiline (MDA, CASNo. 101-77-9) and 4-methyl-m-phenylenediamine (TDA, CAS No. 95-80-7) arereleased from the PU component and not from a banned azo colorant.

The test method for chlorobenzene and chlorotoluene is performed asspecified in GB/T 20384-2006 (modified). The results from the upperportion M1 and the lower portion M2 are shown in Table 3.Remark:-n.d.=not detected.

TABLE 3 Report Limit Result (mg/Kg) Compounds CAS No. (mg/Kg) M1 M21,2,3,4-Tetrachlorobenzene 634-66-2 0.10 n.d. n.d.1,2,3,5-Tetrachlorobenzene 634-90-2 0.10 n.d. n.d.1,2,3-Trichlorobenzene 87-61-6 0.10 n.d. n.d. 1,2,4,5-Tetrachlorobenzene95-94-3 0.10 n.d. n.d. 1,2,4-Trichlorobenzene 120-82-1 0.10 n.d. n.d.1,2-Dichlorobenzene 95-50-1 0.10 n.d. n.d. 1,3,5-Trichlorobenzene108-70-3 0.10 n.d. n.d. 1,3-Dichlorobenzene 541-73-1 0.10 n.d. n.d.1,4-Dichlorobenzene 106-46-7 0.10 n.d. n.d. 2,3,4,5,6-Pentachlorotoluene877-11-2 0.10 n.d. n.d. 2,3,6-Trichlorotoluene 2077-46-5 0.10 n.d. n.d.2,4-Dichlorotoluene 95-73-8 0.10 n.d. n.d. 2,5-Dichlorotoluene19398-61-9 0.10 n.d. n.d. 2,6-Dichlorotoluene 118-69-4 0.10 n.d. n.d.2-Chlorotoluene 95-49-8 0.10 n.d. n.d. 3,4-Dichlorotoluene 95-75-0 0.10n.d. n.d. 3-Chlorotoluene 108-41-8 0.10 n.d. n.d. 4-Chlorotoluene106-43-4 0.10 n.d. n.d. a,a,a-4-Tetrachlorotoluene 5216-25-1 0.10 n.d.n.d. Hexachlorobenzene 118-74-1 0.10 n.d. n.d. Pentachlorobenzene608-93-5 0.10 n.d. n.d. Tetrachloro-m-xylene 877-09-8 0.10 n.d. n.d.

The test method for chlorophenols is performed as specified in ISO17070: 2015 (IULTCS/IUC 25). The results from the upper portion M1 andthe lower portion M2 are shown in Table 4. Remark:-n.d.=not detected.

TABLE 4 Report Limit Result (mg/Kg) Compounds CAS No. (mg/Kg) M1 M24-chloro-3-methylphenol 59-50-7 0.05 n.d. n.d. (CMK) Tetrachlorophenol(TeCP) 25167-83-3 0.05 n.d. n.d. 2-Chlorophenol (2-CP) 95-57-8 0.05 n.d.n.d. 3-Chlorophenol (3-CP) 108-43-0 0.05 n.d. n.d. 4-Chlorophenol (4-CP)106-48-9 0.05 n.d. n.d. 2,6-Dichlorophenol (2,6-DCP) 87-65-0 0.05 n.d.n.d. 2,5-Dichlorophenol (2,5-DCP) 583-78-8 0.05 n.d. n.d.2,4-Dichlorophenol (2,4-DCP) 120-83-2 0.05 n.d. n.d. 3,5-Dichlorophenol(3,5-DCP) 591-35-5 0.05 n.d. n.d. 2,3-Dichlorophenol (2,3-DCP) 576-24-90.05 n.d. n.d. 3,4-Dichlorophenol (3,4-DCP) 95-77-2 0.05 n.d. n.d.2,4,6-Trichlorophenol 88-06-2 0.05 n.d. n.d. (2,4,6-TriCP)2,3,5-Trichlorophenol 933-78-8 0.05 n.d. n.d. (2,3,5-TriCP)2,4,5-Trichlorophenol 95-95-4 0.05 n.d. n.d. (2,4,5-TriCP)2,3,4-Trichlorophenol 15950-66-0 0.05 n.d. n.d. (2,3,4-TriCP)3,4,5-Trichlorophenol 609-19-8 0.05 n.d. n.d. (3,4,5-TriCP)2,3,5,6-Tetrachlorophenol 935-95-5 0.05 n.d. n.d. (2,3,5,6-TeCP)2,3,4,6-Tetrachlorophenol 58-90-2 0.05 n.d. n.d. (2,3,4,6-TeCP)2,3,4,5-Tetrachlorophenol 4901-51-3 0.05 n.d. n.d. (2,3,4,5-TeCP)Pentachlorophenol (PCP) 87-86-5 0.05 n.d. n.d.

The test method for chlorinated solvent is performed as specified in EPASW-846 Method 3550C, GCMS/GC-ECD. The results from the upper portion M1and the lower portion M2 are shown in Table 5. Remark:-n.d.=notdetected.

TABLE 5 Report Limit Result (mg/Kg) Compounds CAS No.

M1 M2 1,1,1,2-Tetrachloroethane 630-20-6 5 n.d. n.d.1,1,1-Trichloroethane 71-55-6 5 n.d. n.d. 1,1,2,2-Tetrachloroethane79-34-5 5 n.d. n.d. 1,1,2-Trichloroethane 79-00-5 5 n.d. n.d.1,1-Dichloroethane 75-34-3 5 n.d. n.d. 1,1-Dichloroethene 75-35-4 5 n.d.n.d. 1,2-dichloroethane 107-06-2 5 n.d. n.d. Bromodichloromethane75-27-4 5 n.d. n.d. Bromoform 75-25-2 5 n.d. n.d. Carbon tetrachloride56-23-5 5 n.d. n.d. Chloroform 67-66-3 5 n.d. n.d.Cis-1,2-Dichloroethene 156-59-2 5 n.d. n.d. Dibromochloromethane124-48-1 5 n.d. n.d. Dibromomethane 74-95-3 5 n.d. n.d.Hexachlorobutadiene 87-68-3 5 n.d. n.d. Hexachloroethane 67-72-1 5 n.d.n.d. Methylene chloride 75-09-2 5 n.d. n.d. (Dichloromethane)Tetrachloroethene 127-18-4 5 n.d. n.d. Trans-1,3-Dichloropropene10061-02-6 5 n.d. n.d. Trans1,2Dichloroethene 156-60-5 5 n.d. n.d.Trichloroethene 79-01-6 5 n.d. n.d. Vinyl chloride 75-01-4 5 n.d. n.d.

indicates data missing or illegible when filed

The test method for flame retardant is performed as specified in GB/T26125-2011. The results from the upper portion M1 and the lower portionM2 are shown in Table 6. Remark:-n.d.=not detected.

TABLE 6 Report Limit Result (mg/Kg) Compounds CAS No. (mg/Kg) M1 M2Hexabromocyclododecane 25637-99-4 10  n.d. n.d. (HBCDD) Polybrominatedbiphenyls — 10 n.d n.d. (PBB) Polybrominated — 10 n.d n.d. diphenylethers Tri-(2,3-dibromopropyl)- 126-72-7 10  n.d. n.d. phosphate (TRIS)Tris(2-chlorethyl)-phosphate 115-96-8 10 n.d n.d. (TCEP) Tris-(1,3-13674-87-8 10 n.d n.d. dichloropropyl)-

indicates data missing or illegible when filed

The test method for heavy metals is performed as specified in QB/T4340-2012. Analyzed by ICP-MS. The results from the upper portion M1 andthe lower portion M2 are shown in Table 7. Remark:-n.d.=not detected.

TABLE 7 Report Limit Result (mg/Kg) Compounds CAS No. (mg/Kg) M1 M2Cadmium (Cd) 7440-43-9 10 n.d. n.d. Lead (Pb) 7439-92-1 10 n.d. n.d.

The test method for organotin compounds is performed as specified inISO/TS 6179:2012. The results from the upper portion M1 and the lowerportion M2 are shown in Table 8. Remark:-n.d.=not detected.

Report Limit Result (mg/Kg) Compounds CAS No. (mg/Kg) M1 M2Tetrabutyltin (TeBT) 1461-25-2 0.02 n.d. n.d. Tricyclohexyltin (TrCyT)6056-50-4 0.02 n.d. n.d. Monobutyltin (MBT) 78763-54-9 0.02 n.d. n.d.Dibutyltin (DBT) 14488-53-0 0.02 n.d. n.d. Tributyltin (TBT) 36643-28-40.02 n.d. n.d. Monooctyltin (MOT) 94410-07-8 0.02 n.d. n.d. Dioctyltin(DOT) 250252-87-0 0.02 n.d. n.d. Triphenyltin (TPhT) 668-34-8 0.02 n.d.n.d. Trioctyltin (TOT) — 0.02 n.d. n.d. Tripropyltin (TPrT) — 0.02 n.d.n.d.

The test method for phthalates is performed as specified in ISO/TS16181:201. The results from the upper portion M1 and the lower portionM2 are shown in Table 9. Remark:-n.d.=not detected.

TABLE 9 Report Limit Result (%) Compounds CAS No.

M1 M2 Di-2-ehtylhexyl phthalate 117-81-7 0.0030 0.0048 n.d. (DEHP)Diisobutyl phthalate (DIBP) 84-69-5 0.0030 n.d. n.d. Dibutyl phthalate(DBP) 84-74-2 0.0030 0.18  n.d. Diisononyl phthalate (DINP) 28553-12-00.010 n.d. n.d. Diisodecyl phthalate (DIDP) 26761-40-0 0.015 n.d. n.d.Di-n-octyl phthalate (DnOP) 117-84-0 0.0030 n.d. n.d.Bis(2-methoxyethyl) phthalate 117-82-8 0.0030 n.d. n.d. (BMEP/DMEP)Diethyl phthalate (DEP) 84-66-2 0.0030 n.d. n.d. Phtahalic acid, 85-68-70.0030 n.d. n.d. benzylbutyl ester (BBP) Di-n-hexyl phthalate (DNHP)84-75-3 0.0030 n.d. n.d. Dimethyl phthalate (DMP) 131-11-3 0.0030 n.d.n.d. Di-propyl phthalate (DPrP) 131-16-8 0.0030 n.d. n.d. Diisooctylphthalate (DIOP) 27554-26-3 0.0030 n.d. n.d. Dicyclohexyl phthalate84-61-7 0.0030 n.d. n.d. Dinonyl phthalate (DNP) 84-76-4 0.0030 n.d.n.d.

indicates data missing or illegible when filed

The test method for perfluorooctanesulfonates & perfluorooctanoic Acidis performed as specified in CEN TS 15968: 2010(E). The results from theupper portion M1 and the lower portion M2 are shown in Table 10.Remark:-n.d.=not detected.

TABLE 10 Report Limit Result (mg/Kg) Compounds CAS No. (mg/Kg) M1 M2Perfluorooctanoic acid 335-67-1 0.002 n.d. n.d. PerfluorooctaneSulphonate 1763-23-1 0.002 n.d. n.d. (PFOS)

The test method for short-chain chlorinated paraffins is performed asspecified in ISO 18219:2015 (modified). The results from the upperportion M1 and the lower portion M2 are shown in Table 11.Remark:-n.d.=not detected.

TABLE 11 Report Limit Result (mg/Kg) Compounds CAS No.

M1 M2 Short-chain Chlorinated 85535-84-8 50 n.d. n.d. Paraffins (SCCP)

indicates data missing or illegible when filed

Referring to Table 1 to Table 11, no toxic substances, such asalkylphenol & alkylphenolethoxylate, banned azo dyes, chlorobenzene andchlorotoluene, chlorophenols, chlorinated solvents, flame retardant,heavy metals, organotin compounds, phthalates, perfluorooctanesulfonates& perfluorooctanoic acid, and shot-chain chlorinated paraffins, aredetected on both the upper portion and lower portion of the non-toxinadhesiveless slipper in the present invention. Therefore, the non-toxinadhesiveless slipper of the present invention is an eco-friendlyslipper, which fulfills th future environmental trends.

One skilled in the art will understand that the embodiment of thepresent invention as shown in the drawings and described above isexemplary only and not intended to be limiting.

It will thus be seen that the objects of the present invention have beenfully and effectively accomplished. The embodiments have been shown anddescribed for the purposes of illustrating the functional and structuralprinciples of the present invention and is subject to change withoutdeparture from such principles. Therefore, this invention includes allmodifications encompassed within the spirit and scope of the followingclaims.

What is claimed is:
 1. A non-toxin adhesiveless slipper, comprising: anupper portion and a lower portion; wherein said upper portion and saidlower portion are bonded with each other by an adhesive film.
 2. Thenon-toxin adhesiveless slipper, as recited in claim 1, wherein saidlower portion are natural rubbers and ethylene propylene rubbers.
 3. Thenon-toxin adhesiveless slipper, as recited in claim 1, wherein rawmaterials of said lower portion comprises natural rubber, ethylenepropylene rubbers, white mineral oil, white carbon, polypropylene,starch-filled substance, vulcanization accelerator, and stearic acid. 4.The non-toxin adhesiveless slipper, as recited in claim 3, wherein theweight ratio of the natural rubber, ethylene propylene rubbers, whitemineral oil, white carbon, polypropylene, starch-filled substance,vulcanization accelerator, and stearic acid is40:33:17:5:5-15:6-15:2-5:3.
 5. The non-toxin adhesiveless slipper, asrecited in claim 1, wherein said lower portion can be made of syntheticrubber.
 6. The non-toxin adhesiveless slipper, as recited in claim 1,wherein said lower portion can be made of thermoplastic polyolenfin. 7.The non-toxin adhesiveless slipper, as recited in claim 6, wherein saidthermoplastic polyolenfin comprises ethylene propylene, white mineraloil, and isoprene, wherein the weight ratio of the ethylene propylene,white mineral oil, and isoprene is 33-37:14-17:46-53.
 8. The non-toxinadhesiveless slipper, as recited in claim 1, wherein said upper portionof are made of EVA components.
 9. The non-toxin adhesiveless slipper, asrecited in claim 8, wherein said EVA components comprises EVA,polyoxyethylene, filling agent, natural particles, cross-linking agent,zinc oxide, foaming agent, and stearic acid, wherein the weight ratio ofEVA, polyoxyethylene, filling agent, natural particles, cross-linkingagent, zinc oxide, foaming agent, and stearic acid is10-20:30-40:10-15:30-40:0.5-5.5:2.0-3.0:0.8-5.8:10-20.
 10. The non-toxinadhesiveless slipper, as recited in claim 1, wherein said adhesive filmis a compound film made of EAA(ethylene acrylic acid) and EVA(ethylene-vinyl acetate), and the weight ratio of EAA and EVA is80-86:14-20.
 11. The non-toxin adhesiveless slipper, as recited in claim1, wherein said adhesive film can be a composite PE film, wherein saidcomposite PE film comprises low density polyethylene and linear and lowdensity polyethylene.
 12. A processing method for bonding an upperportion and a lower portion of a non-toxin adhesiveless slippertogether, comprising steps of: a. heat melting the EVA and the EAA toform a fluid compound, and blowing the fluid compound on a bottomsurface of said upper portion to form an adhesive film; b. placing anisolated paper on said adhesive film; c. placing said upper portion intoa heat-pressing machine for 16-20 seconds, and the temperature insidethe heat-pressing machine is around 150° C. to 180° C., so as to ensurethe adhesive film and isolated paper securely attached on the bottomsurface of said upper portion; d. placing a rubber sheet on a mold toprocess a heat pressing for 45-60 seconds, and a pressing temperature isaround 150° C. to 180° C., and then removing the remaining rubber on thecontours of said mold to form said lower portion; e. placing said upperportion and said lower portion into a sectional die, and then processingthe heat-pressing for 240-300 seconds, and the heat-pressing temperatureis around 150° C. to 200° C.
 13. The processing method, as recited inclaim 12, wherein in said step a, said adhesive film is a porous film.14. The processing method, as recited in claim 12, wherein in said stepa, said adhesive film is a compound film made of EAA(ethylene acrylicacid) and EVA (ethylene-vinyl acetate), and the weight ratio of EAA andEVA is 80-86:14-20.
 15. The processing method, as recited in claim 12,wherein in said step a, said adhesive film can be a composite PE film,wherein said composite PE film comprises low density polyethylene andlinear and low density polyethylene.
 16. The processing method, asrecited in claim 12, wherein in said step a, said upper portion of aremade of EVA components.
 17. The processing method, as recited in claim12, wherein in said step a, said EVA components comprises EVA,polyoxyethylene, filling agent, natural particles, cross-linking agent,zinc oxide, foaming agent, and stearic acid, wherein the weight ratio ofEVA, polyoxyethylene, filling agent, natural particles, cross-linkingagent, zinc oxide, foaming agent, and stearic acid is10-20:30-40:10-15:30-40:0.5-5.5:2.0-3.0:0.8-5.8:10-20.
 18. Theprocessing method, as recited in claim 12, wherein in said step d, saidrubber sheet are natural rubbers and ethylene propylene rubbers.
 19. Theprocessing method, as recited in claim 12, wherein in said step d, saidrubber sheet comprises natural rubber, ethylene propylene rubbers, whitemineral oil, white carbon, polypropylene, starch-filled substance,vulcanization accelerator, and stearic acid.
 20. The processing method,as recited in claim 19, wherein the weight ratio of the natural rubber,ethylene propylene rubbers, white mineral oil, white carbon,polypropylene, starch-filled substance, vulcanization accelerator, andstearic acid is 40:33:17:5:5-15:6-15:2-5:3.
 21. The processing method,as recited in claim 12, wherein in said step d, said rubber sheet can bemade of synthetic rubber.
 22. The processing method, as recited in claim12, wherein in said step d, said rubber sheet can be made ofthermoplastic polyolenfin.
 23. The processing method, as recited inclaim 22, wherein said thermoplastic polyolenfin comprises ethylenepropylene, white mineral oil, and isoprene, wherein the weight ratio ofthe ethylene propylene, white mineral oil, and isoprene is33-37:14-17:46-53.